Management Approach for Turner Syndrome with Suspected Panhypopituitarism

Diagnostic Evaluation

• The American College of Radiology recommends performing a complete evaluation of all anterior pituitary hormone axes, as panhypopituitarism occurs in 6-29% of patients with pituitary disorders 1
• Morning laboratory tests should include thyroid function, adrenal function, growth hormone axis, prolactin levels, and glycemic control, according to the Journal for ImmunoTherapy of Cancer 2
• An MRI of the sella with pituitary cuts is recommended for all patients with suspected panhypopituitarism, as suggested by the Journal for ImmunoTherapy of Cancer and the Journal of the American College of Radiology 2, 4
• The diagnostic criteria for hypophysitis include ≥1 pituitary hormone deficiency combined with MRI abnormality, or ≥2 pituitary hormone deficiencies with headache and other symptoms, as proposed by the Journal for ImmunoTherapy of Cancer 2

Management Approach

• The Endocrine Society recommends that adrenal insufficiency must be addressed first before treating other hormonal deficiencies to avoid precipitating an adrenal crisis, with a strength of evidence rated as high 2
• Thyroid hormone replacement should be initiated after addressing adrenal insufficiency, as recommended by the Journal for ImmunoTherapy of Cancer 2
• Growth hormone therapy should be considered, especially in children and adolescents with Turner syndrome who have documented GH deficiency, according to the European Heart Journal 5
• Regular monitoring of hormone replacement adequacy is necessary, including thyroid function, adrenal function, and metabolic panel, as suggested by the Journal for ImmunoTherapy of Cancer 2

Special Considerations

• The European Heart Journal recommends evaluating for concomitant cardiovascular abnormalities common in Turner syndrome, with a strength of evidence rated as moderate 5
• Monitoring aortic dimensions using appropriate indices is necessary, as suggested by the European Heart Journal 5
• Lifelong hormone replacement is typically needed for pituitary hormone deficiencies, with a strength of evidence rated as high, according to the Journal for ImmunoTherapy of Cancer 2
• Regular follow-up with endocrinology is essential to adjust hormone replacement doses as needed, as recommended by the European Heart Journal 5